Size dependent active effect of CdTe quantum dots on pyrogallol-H2O2 chemiluminescence system for chromium(III) detection

被引：31

作者：

Kanwal, Shamsa ^{[1
]}

Fu, Xiaohong ^{[1
]}

Su, Xingguang ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, Dept Analyt Chem, Changchun 130012, Peoples R China

来源：

MICROCHIMICA ACTA | 2010年 / 169卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

CdTe Quantum Dots; Flow injection analysis; Chemiluminescence; Chromium(III); GOLD NANOPARTICLES; SENSITIZED CHEMILUMINESCENCE; NANOCRYSTALS; OXIDATION; EMISSION;

D O I：

10.1007/s00604-010-0334-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Water-soluble CdTe quantum-dots (QDs) of different sizes and capped with mercaptosuccinic acid were prepared by the microwave irradiation method. The QDs can significantly enhance the chemiluminescence (CL) of the pyrogallol-H2O2 system. Those with a diameter of 3.8 nm produce the most intense CL. UV-vis, photoluminescence, and CL spectra were acquired in order to explore the effect. The results showed that the chromium(III) ion in the concentration range from 20 pM to 30 A mu M enhances CL, and this is exploited for its trace determination.The limit of detection (3 sigma) is 6 pM, with a relative standard deviation (n = 11) of 1.7%. A continuous flow injection CL method was developed and applied to the determination of chromium(III) in tap water and lake water samples with satisfactory results.

引用

页码：167 / 172

页数：6

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